Environmental sanitizer and odor remover for purification of foods, surfaces, air and water with disposable ozone generation electrode, pressure/flow adaptable venturi injector and aqueous phase filter device

ABSTRACT

A dielectric assembly for generating ozone includes a positive electrode, a negative electrode, a dielectric for generating the ozone, and a knob adapted to extend outside of a housing into which the dielectric assembly is to be placed. A system is also provided for sanitizing and deodorizing water, food, surfaces and air including a microbiological reduction filter device having an input connected to a water supply, a venturi injector disposed within a housing and connected to an output of the microbiological reduction filter device which generates ozone and mixes the generated ozone with the water, and an electrode assembly comprising a plurality of electrodes, a dielectric for generating the ozone, and a knob extending outside of the housing. The dielectric in a first embodiment and the entire dielectric assembly in a second embodiment can be removed from the housing and replaced in its entirety by the knob.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a divisional of U.S. Application No.12/427,603, filed Apr. 21, 2009, which is a divisional of U.S.application Ser. No. 10/832,401, filed Apr. 27, 2004, which claimspriority to U.S. Provisional Application Ser. No. 60/481,867, filed Jan.7, 2004, the entire contents of all of which are incorporated herein byreference.

FIELD OF THE INVENTION

The present invention relates to the use of ozone together withmicrobiological barrier filtration as sterilization for point of usepurification, sanitization and odor removal for foods, surfaces,articles, water and air. In particular the present invention relates tocorona discharge ozone generator and ozone injection and sanitizerdispensing devices configured for such purpose that are easilymaintained and economical to manufacture and to operate. Even moreparticularly, the present invention provides ozone generation dielectricassemblies for use in such a device, each of which is easily and quicklyremoved, disposed of and replaced without accessing the inside of thehousing. The present invention also includes a means of connecting theozone generation assemblies to the ozone injection device by a simpleassembly manifold. Additionally, the present invention includes an ozoneinjection device featuring replaceable venturi motive flow throats,which permit proper operation under a variety of pressure and flow rateconditions. The present invention also provides a means of utilizing theozone produced by the generator for controlling odors in the ambient airat point of use as well as remotely from the device with the use of aconnecting tube and direct gas phase insertion and dispensing device.

BACKGROUND OF THE INVENTION

Ozone is an allotropic form of oxygen, which is produced in nature bythe exposure of oxygen molecules (O2) to ultraviolet light or to thehigh voltage associated with lightning. Such exposure breaks apart theoxygen molecules into mono-atomic oxygen and recombines a portion of theoxygen atoms and molecules to form ozone (O3). Manmade ozone is createdby the passage of dry, ambient air or pure oxygen either past a sourceof ultraviolet light or through an electrical discharge, commonly calleda corona, which is produced by an electric charge between parallel orconcentric electrodes separated by a dielectric to prevent a sparkdischarge. Ozone produced by corona discharge typically is of a higherconcentration than ozone produced by ultraviolet light, thus is renderedmore useful for oxidation and purification applications such as may beemployed for treatment of liquids and surfaces, as well as odor removalfor in-door air. The formation of ozone via the corona discharge methodhas a concurrent formation of nitrous compounds, which, in the presenceof moist air, precipitate small amounts of nitric acid inside the ozonegeneration chambers. Therefore, air dryers producing very low dew pointair are typically employed along with the ozone generator to prevent theacid precipitation from fouling dielectrics and reducing ozoneproduction capabilities.

Ozone is recognized as a potent sanitizer for rinsing and treating foodsand surfaces in both aqueous and gas phase. It also is a proven waterpurifier as well. Ozone is a highly reactive oxidizer, the applicationof which as a sterilizing and preserving agent is well known. It is themost powerful disinfectant commonly available for food sanitizing andfor water treatment and is capable of destroying bacteria up to 3,125times faster than chlorine. Its ability to destroy such bacteria as E.Coli virtually on contact is well documented as is its effectivenessagainst such germs as staphylococcus and salmonella. In 1997 the UnitedStates Food and Drug Administration recognized and approved ozone as aprocess for sanitizing the surfaces of food. The bottled water industry,together with the US Food and Drug Administration and many state healthagencies, which regulate bottled water production, recognize thepurification and post-sanitizing efficiency of ozone and specify that anozone residual in bottled water shall be between 0.1 and 0.4 Parts PerMillion. Ozone's ability to minimize microbiological contamination onthe surfaces of meat, cheese, eggs, poultry, fruits, vegetables and soforth has been known since the early 20th century. The treatment offoodstuffs with ozone has been successfully applied both in aqueousphase and gas phase. The resulting enhancement to food safety and theextension of shelf life of such items has made ozone a valuable adjunctto modern food processing and storage operations.

More recently, in studies by the Clemson University Department of DairyScience, ozone has been proven to be a powerful sterilizer and sanitizerof microbiologically contaminated surfaces that have been subjected to astream of ozonated water. Further recent studies by the Food Science andNutrition Department of California Polytechnic University, San LuisObispo, in conjunction with the inventor of the present invention,confirmed that common microbiological contaminants on food surfaces suchas total coliforms, e. coli, e. coli 0157:H7, salmonella, listeria,campylobacter, shigella and staphylococcus can be significantly reducedby low level dissolved ozone application ranging from 0.1 to 0.3 PartsPer Million (PPM). Unlike chemical sanitizers, ozone leaves no chemicalresidue on treated surfaces, thus it is a highly desirable technologyfor use in large food processing plants as well as in small commercialapplications, such as restaurants, and in personal household use forrinsing such items as dishes, cutting boards, utensils, kitchen sponges,meat trays and so forth, as well as foods. While large-scale ozone foodsanitizing process systems have become common, there has been no viableozone-based sanitizing device available for household or smallcommercial process applications. As the public becomes more aware of theimportance of controlling microbiological contamination of food andsurfaces, as well as of water, an effective means of applying ozonepurification and sanitization that is simple, safe and economical isneeded.

Ozone is indiscriminate in its reaction with microbes, therefore adevice for applying such low level ozone amounts for aqueous phase foodsanitizing must include a means of assurance that the water into whichthe ozone is injected is microbiologically pure so that there is littleor no ozone demand present to reduce the ozone available for sanitizingrinse. Additionally, the ozone must be applied in a manner thatthoroughly and reliably dissolves the low level ozone at a range ofwater pressure and flow rates that may be encountered in the field. Theozone injector would ideally incorporate a reliable means for protectingthe ozone generator from water backing up into the generationelectrodes. Additionally, the application of gaseous phase ozone forodor control in ambient air, as well as on selected items, would be adesirable feature as an optional use for such a generation device.

An ozone generator for such application as described needs to be simple,economical and convenient to use. Additionally, it needs to producerelatively high concentration of ozone from ambient air capable ofmaintaining dissolved ozone residuals in a range of 0.1 to 0.4 PPM.Preferably, such a generator would be of simple construction, whichrequires minimal service and maintenance. A desirable feature of asimple ozone generator would be its capability to function at fullcapacity without the necessity of drying the air feed to the ozonegeneration electrodes. Although there have been attempts to createcleanable electrodes, the inevitable buildup of nitric acid combinedwith ambient dust and similar contaminants in electrode components thatare inaccessible makes the long term operation of such devicesproblematic. A related problem is that the ultimate buildup of dusty,sticky, acidic film which is difficult to remove may increase thedielectric strength of the dielectric over time, reducing the power ofthe corona, which results in the reduced concentration of ozoneproduced.

One of the greatest drawbacks of small under-the-counter or countertopozone systems has been the use of air dryers to prevent the build up ofnitric acid on ozone generator dielectrics. Small air dryers for suchapplications typically have consisted of containers of silica gel,molecular sieve or similar moisture absorbing agents. These agents mustbe regenerated frequently via the application of high heat. Thisregeneration necessity contributes to an excessive maintenance task,which is impractical for the average household or small commercialoperation. Although automatically regenerating air dryers are available,they are generally too expensive to make such a system practical from amarketing point of view.

Another drawback for previously designed systems has been the method ofdissolving ozone in the water. The two primary methods employed havebeen bubbling or sparging ozone into a container of water or using aventuri injector to draw the ozone into a stream of water. The first ofthese two methods creates limitations as to the amount of water that canbe treated during a given time period since it relies on the completedirect contact of virtually every molecule of water with ozonemolecules. This time factor precludes bubbling as a practical method forpurifying a continuous stream of water although the technique remainsviable when directed to a small container of water. The second methodcited, venturi injection, can be highly efficient, but previous attemptsto apply ozone have not addressed efficient injection design across arange of pressure and flow rate conditions. The technology requires avery specific pressure differential across the venturi in order for,first, the ozone to be drawn into the water and, second, for the ozoneto be thoroughly and violently dissolved in the water for maximummicrobiological and oxidative effect. The general function parameters ofa venturi-based ozone injection system require carefully controlledpressure factors both upstream and down stream of the injector.

A major limitation of venturi-based ozone systems has been the lack of adownstream faucet or dispenser valve that maintains adequate free flowwithout creating a backpressure that defeats the ability of the venturito draw in ozone and dissolve it thoroughly.

Another shortcoming of previous art in the design of small undercounterand countertop ozone systems has been the use of high voltagealternating current transformers, typically producing upwards of 4,000volts AC. Inasmuch as these transformers must be in close proximity tothe ozone generation electrodes, which, in turn, must be in closeproximity to the water being treated, hazardous conditions are presentedwhich make such systems unacceptable for household or small commercialapplications. Alternating current-based ozone systems also cannot beutilized in remote applications, such as emergency water purification orsolar powered water purification, without the addition of expensivepower converters.

Previous system designs have attempted to utilize low voltage directcurrent electronics to overcome the hazards associated with high voltagealternating current. However, the electrical design employedtransistorized computer chip technology to deliver spiked direct currentto an electrical coil, which, in turn, supplied power to the coronaproducing electrodes. The shortcomings of this design are that thetransistor of the chip heats rapidly, which results in the fading of itsability to produce a consistent level of ozone.

SUMMARY OF THE INVENTION

Accordingly, the present invention has an object, among others, toovercome deficiencies in the prior art such as noted above.

The present invention relates to a surface sanitizing and deodorizingdevice wherein ozone gas is created for aqueous phase applications aswell as gaseous phase applications. In a first operational mode, wateris employed as a vehicle to deliver ozone gas to the surfaces of foodsand the food preparation environment as well other surfaces and articlesat the point of use. In a second operational mode of the presentinvention, ozone in gas phase is delivered to a point of use port forambient air odor control and for remote gas phase sanitation of foods,articles or surfaces. In a third operational mode, the ozone generationmay be turned off, permitting the passage of water that is filtered butnot transporting ozone.

In a first aspect, the present invention is directed toward a device forcreating ozone that has ozone generation dielectric components which areaccessible from outside the device housing and ozone generationdielectric and electrode components which are accessible from outsidethe housing and which are disposable as a unit.

In a second aspect, the present invention is directed toward the meansto channel ozone from the point of generation and to dissolve the ozonein the water utilizing an ozone gas inductor having a replaceable motivethroat and to dispense ozone to sanitize foods, surfaces and water.

In a third aspect, the present invention is directed toward a means ofproviding the option to deodorize air at the point of use environmentwithout altering the integrity of the invention to provide aqueous phasesurface sanitization.

In a fourth aspect, the present invention is directed toward a means ofutilizing gas phase ozone to treat articles remotely via an extendedozone gas phase transfer device.

In a fifth aspect, the present invention is directed toward a means ofpre-treating the water flowing through the invention aqueous channelutilizing microbiological barrier filtration to reduce or eliminate theozone demand of the water.

In a sixth aspect of the present invention, the filtration components asdescribed above, are separately mounted remote from the ozone generationand injection component housing of the present invention. Connection tothe water intake port of the invention is made from the filtered wateroutput port of the filtration or reverse osmosis system. Thus, thepresent invention permits the application of dissolved ozone forsanitizing of foods in use with pre-existing filtration or reverseosmosis systems.

In a seventh aspect of the present invention, the system water inputline may be connected to a 12 volt direct current water pump which willprovide the motive force for water to be processed through the system.Power to the system itself may be supplied by any 12-volt direct currentsource, such as an automotive battery, an automobile cigarette lighterplug receptacle or a solar powered battery. In this embodiment, thepresent invention may be utilized for remote water purification or foremergency water purification.

In an eighth aspect of the present invention, an alternate embodiment ofthe present invention, the KX Industries Microbiological reductionfilter may be used singularly with the ozone generation and injectiondevice in a counter-top version.

BRIEF DESCRIPTION OF THE DRAWINGS

For better understanding of the invention and additional objects andadvantages thereof, reference is made to the following detaileddescription and accompanying drawing of a preferred embodiment, wherein:

FIG. 1 illustrates the total physical layout of one embodiment of thepresent invention utilizing the tubular disposable electrode assembly,the air and gas manifolds, and the venturi injector;

FIG. 2 illustrates the exploded view of one embodiment of the ozonedistribution manifold, air intake manifold and venturi injectoraccording to the present invention;

FIG. 3 illustrates a 3-D view of the mounting plate showing the means ofsnap lock connections on the manifolds and venturi injector according toone embodiment of the present invention;

FIG. 4 illustrates four 3-D views of the present invention;

FIG. 5 illustrates the cross sectional perspective of FIG. 2;

FIG. 6 illustrates a 3-D exploded view of one embodiment of the presentinvention;

FIG. 7 illustrates an exploded view of one embodiment of the presentinvention;

FIG. 8 illustrates an exploded view of the manifold and the venturiinjector according to another embodiment of the present invention; and

FIG. 9 illustrates an enlarged exploded view of the connection of thedielectric assembly to the power supply according to another embodimentof the present invention.

DETAILED DESCRIPTION OF THE INVENTION

According to one operational mode of the present invention, in anaqueous ozonation phase, the water serves as the vehicle to deliver thesanitizing power of the ozone gas to purify the surfaces, and/or removeodors, on foods surfaces and articles. According to another operationalmode of the present invention, a gaseous phase, ozone gas is pumpeddirectly into the air through the ozone gas phase delivery port, atwhich point it may be dispersed directly into the ambient air to oxidizeodor molecules in the area of location, or it may be further directedvia a tube inserted into the gas phase delivery port and thereby routedand directed to a localized point for odor removal through oxidation ofthe odor causing molecules in an article (i.e., stinky sneakers) orsurface. According to yet another operational mode, an aqueousnon-ozonation phase, the water is purified by passing through filters,and exits the system without being mixed with ozone gas.

According to one embodiment of the present invention, in the aqueousphase of operation, water is first filtered through a coarseone-micron-plus carbon particulate filter to remove particulate andchemical contamination. Upon exiting the first filter, the water passesthrough a submicron or nanofiber microbiological reduction filtrationdevice, specifically including, but not limited to, that patented (U.S.Pat. No. 6,660,172, incorporated by reference herein in its entirety) byE.E. Koslow and produced by KX Industries, L.P., of 269 South LambertRoad, Orange, Conn. 06477-3502 USA, called the “Matrix MicrobiologicalBarrier” with superior microbiological reduction claims. Thesecapabilities have been certified by the State of California Departmentof Health Services. The filtration products were certified to meet thefollowing standards: bacterial reduction of 99.9999%, viral reduction of99.99%, and oocyst (protozoan) reduction of 99.95%. The filtrationdevice meets California-certified microbiological reduction claims.Various technical articles in the literature have recognized theefficacy of combining pre-filtration with ozone post-treatment forcontrolling cysts such as cryptosporidium and giardia. However, thelevels of ozone desirable for point of use food sanitizing, 0.1 to 0.3PPM, are too low to be effective against such cysts. Therefore, it isdesirable to employ a type of filtration that mechanically reduces thepresence of cysts, as well as other forms of microbiological ozonedemand in the water.

In prior art systems, ozone was used as a primary disinfectant for thewater, which reduced the ozone level available for disinfection at thepoint of use. According to an embodiment of the present invention, theinclusion of a microbiological barrier device reduces or minimizes theozone demand of the water, making virtually all the ozone carried by thewater available for sanitizing foods and surfaces.

The inclusion of the above referenced specific filter as a componentalso provides benefits by virtue of its ability to halt the flow ofwater through the entire system of the invention when the filtrationcapability has reached its design limit. The filter does so by creatinga gel that completely plugs the filter cartridge when the organic load,as evidenced by the presence of organic (humic or fulvic) acids on theexterior of the cartridge, exceeds its maximum design flowspecification. Another embodiment of the present invention includespre-treatment by carbon and low micron or sub-micron fine filtration, orby reverse osmosis, to create an ozone residual in the treated water toenhance the microbiological integrity of the water for drinking, cookingand other uses.

According to one embodiment of the present invention, ozone is createdby a corona discharge electrode, which utilizes pulsed direct currentvoltage between 9 and 24 volts DC at a frequency between 8 Kilohertz and35 Kilohertz, the dielectric of which is easily replaced from outsidethe invention housing, thereby avoiding the necessity of an air dryer.The corona discharge electrode also has a unique interface with a highvoltage DC power supply coil that allows compact design and simpleassembly.

The present invention contemplates two embodiments of the ozonegeneration device, a dielectric assembly and an ozone generationelectrode dielectric assembly, that are each disposable, replaceable andeasily accessible from outside the ozone generator cabinet or housing.Ozone generation electrodes for creating ozone by the corona dischargemethod generally are comprised of two conductive members separated by adielectric. Such electrodes sets may be flat, tubular or other shapes.According to one embodiment, the entire dielectric assembly, includingthe dielectric and two electrodes, is disposable and is easily accessedfrom outside the housing of the device. According to another embodimentof the present invention, a removable, disposable dielectric is providedthat is easily accessed from outside the housing separately from theelectrodes.

In prior art systems, the user could potentially be exposed to highvoltage inside the device housing when attempting to remove thedielectric for cleaning. One embodiment of the ozone generationelectrode according to the present invention solves this problem byproviding a replaceable hollow tubular dielectric composed ofborosilicate or other heat resistant glass that is open on both ends ofthe tube. One end of the dielectric is permanently and frictionallyencapsulated by a thermoplastic knob that permits the removal, disposaland replacement of the dielectric assembly from outside the inventionhousing. The dielectric knob additionally secures the electricalintegrity of the anodic and cathodic electrode components by pressingthe dielectric firmly in to its distal end mounting and holding it inplace by means of a screw-in locking method and rubberized o-ring spacerwhich maintains contact tension, thereby preventing an arcing that mightotherwise occur if the dielectric was not firmly in place. According tothe present invention, the entire electrode assembly may be manufacturedin a variety of dimensions or diameters according to the desired levelof ozone output or spatial limiting factors. The ability for the user toremove and dispose of the borosilicate glass dielectric or thedielectric assembly avoids the necessity of attempting to clean nitricacid accumulation from the ozone generation dielectric that could exposethe user to possible acid burns or staining of the skin.

The present invention also includes a method of venturi injection andwater dispensing which maintains sufficient ozone residual between 0.1and 0.4 Parts Per Million for assuring microbiological integrity forrinsing surfaces, articles and food items as well as for drinking water.According to an embodiment of the present invention, the motive throatof the venturi injector is replaceable, with each replacement havingdifferent internal diameters to allow for optimum ozone induction andmixing under a range of water flow rates and pressures. Additionally,the motive throat insert may be replaced in the instance of calciumcarbonate or other mineral accumulation in the motive throat innerdiameter, thereby maintaining the functional integrity of the device.

According to one embodiment of the present invention a routing manifoldis provided which permits conduit of ozone gas to the venturi injectorwhen subjected to vacuum from the venturi injector, and, alternatively,to a separate dispensing port for gas phase application when themanifold is pressurized by the air pump.

The process system of this invention can be attached to a cold watersupply line (not shown) with the use of a saddle tee valve, a piercingvalve, slip joint adapter or any similar commonly available undercounterwater diverter valves, the application of which is well known in theart. In the countertop version of the present invention, water may bediverted into the present invention by a faucet mounted diverter valve(not shown). Alternatively, water may be supplied to the system by apump (not shown), preferably one that is capable of delivering at least½ Gallon Per Minute at a minimum of 15 PSI pressure. Water from the coldwater supply line is thereby diverted by way of a flexible hollow tube(not shown), such as is commonly utilized in the art for thecommunication of water, to the system through a slip lock tube fitting(1) into a first filter sump (2 a) containing an internal pre-filtrationcartridge (3). The internal pre-filtration cartridge (3) may be one ofmany commonly available materials designed to remove from waterparticulate material in the nominal size of one micron or larger andwhich also may contain a form of either extruded block or granularactivated carbon for reduction of chemicals, such as chlorine, chlorinecompounds, lead and organic compounds. Alternatively, the pre-filtrationcartridge (3) may consist of a five-micron pre-filter. Filter cartridgesspecifically intended for such utilization are common and well known inthe art, therefore will not be described further here.

Following passage through the first filter sump (2 a) and pre-filtrationcartridge (3), the water exits the sump (2 a) through its outflow portvia a thread by thread coupler (4) and enters a second sump (2 b) andfilter cartridge (5). According to one embodiment of the presentinvention, the filter cartridge (5) is the sub-micron microbiologicalbarrier filter produced by KX Industries, as described above. Otherfilters can be used such as would be known in the art by one of ordinaryskill, including but not limited to a one-micron-absolute carbon blockfilter. Both sumps are mounted to the neither side of the housing of thepresent invention by means of screws (not shown) affixed through slots(134) in the housing floor.

According to another embodiment of the present invention, themicrobiological reduction filter may be the only filter preceding theozone injection. The inclusion of this specific filter assures themicrobiological integrity of the water by removing microbiologicalimpurities therefrom, which permits a consistent level of dissolvedozone to be available for rinsing of foods, surfaces and articles. Thecombination of this specific microbiological reduction filter with postozonation provides advantages over prior art systems.

Following a filtration step as discussed above, the filtered water exitsthe second filter (5) by way of a swiveling elbow slip lock fitting (6)connected to an output of the second sump (2 b). One end of a flexibletube (7) composed of food grade plastic which is common in the art, isinserted into the swiveling elbow slip lock fitting (6). According toone embodiment of the present invention, the flexible tube (7) has aninside diameter of ⅛ inch or greater. The distal end of tube (7) isinserted in a first slip lock bulkhead fitting (8), which is affixedthrough the baseplate 61 of the present invention (see FIG. 4 d). Themale end of a male elbow fitting (9) is frictionally inserted into thefirst slip lock bulkhead fitting (8). A first end of a relatively shortlength of food grade plastic tube (10) is inserted into the other end ofelbow fitting (9). A second end of the tube (10) is inserted into a sliplock fitting (11) which communicates directly to, in one preferredembodiment of the present invention, a flow switch (12) such as iscommon in the art, which accepts the water flow exiting the secondfilter cartridge (5). The movement of the water flow through the switch(12) creates the motive force to activate the switch (12), therebyproviding a means of initiating electrical energy flow from the primarypower source.

According to one embodiment of the present invention, the primary powersource may be a wall-mounted transformer (not shown) that translatesmains voltage alternating current to direct current. Such transformersare commonly available. The translated direct current may range fromnine volts DC, according to one embodiment, to a maximum of 24 volts DC.According to another embodiment, the power source for the presentinvention may be an unregulated direct current battery (not shown) suchas is common in automotive or marine applications.

The water flow exits the flow switch (12) through a second slip lockfitting (13) into which is inserted a first end of a second relativelyshort length of food grade plastic water input tube (14). A second endof the tube (14) is inserted into the water entry port of a venturiinjector (19). The design of the venturi injector according to thepresent invention constitutes a means of mixing ozone gas and water forsanitizing purposes.

The venturi injector (19) is formed of a T-shaped pipe. A first aspectof the venturi injector concerns the method of connecting the watertransport tubes, water input tube (14) and water exit tube (94) on itstwo distal ends, water entry port (91) and water exit port (92),respectively, and its' ozone gas transport tube (28) on its' thirdaperture, gas entry port (93) that is perpendicular to the water flow.The three tube connections each display slip lock connection componentscomprising a collet locking system. In one embodiment according to thepresent invention, the collet locking system is a patented colletlocking system marketed by John Guest USA, 10 Bloomfield Avenue, PineBrook, N.J. 07058-0625. As seen in FIG. 2, the three different venturiapertures are internally stepped at (83), (84) accordingly to accept thethree collet locking system components, i.e., collet (15), (22), and(27), lock ring (16), (21), and (26), and o-ring (17), (20), and (25).The third step (85), (86), and (88) on each venturi aperture,respectively, accepts the ends of plastic tubes (14), (28), and (94),which tubes serve as a stop in each separate instance, and are connectedto one another via a T-shaped central tube (90).

The outside diameter portion (92 a) of the water exit port (92) isthreaded to accommodate threaded nut (23) by which means the venturiinjector (19) is affixed to the housing of the present invention throughan opening in the housing wall (not shown) which is just large enough topermit insertion of threaded portion (92 a) of the venturi injector(19).

The venturi motive throat insert (18), according to one embodiment ofthe present invention, is seated at the base of the stepped aperture(85), where it is pressed in place frictionally by the second end of thetube (14), which in turn is locked in place by the collet lockingsystem. The top ring end (18 a) of the motive throat insert (18) has anoutside diameter substantially identical to the outside diameter of thetube (14), while the bottom end (18 b) is narrower, having a diametersized to fit into the central tube (90). Alternative embodiments of theventuri motive throat insert (18), having inside diameters which areproduced in different widths and lengths, are interchangeable with oneanother to accommodate more or less water flow and water pressureaccording to the application. In the instance of relatively high waterpressure, e.g., above about 60 pounds per square inch (PSI), the innerdiameter is smaller. In the instance of relatively low water pressure,e.g., less than about 30 PSI, the inner diameter of the venturi motivethroat insert (18) is larger. The exact inner motive throat insertdiameter may be varied across a wide range of dimensions within thegeneral concept of the present invention, by which accommodation, asingle molded or machined venturi injector may be adapted to a range ofwater flow and water pressure while maintaining its venturi suction andmixing action with the ozone gas.

An additional aspect of the venturi injector according to the presentinvention is the means by which water is prevented from entering theozone gas transport tube and backing up into the ozone generationdevice. In one embodiment of the present invention, this means is atubular spring-loaded check valve plunger, one version of which isavailable from Smart Products, Incorporated, 1710 Ringwood Avenue, SanJose, Calif. 95131 USA. The tubular cartridge check valve (24) ispressed into place into the fourth (87) of four stepped spaces withinthe gas intake throat (93) of the venturi injector (19) (see e.g., FIG.2). The fourth step (87) is in communication with the central tube (90),via open space 89 (see FIG. 5). The tubular cartridge check valve (24)is in communication with the open space (89), which permits forwardmotion of the check valve (24) without hindrance when suction is createdthrough the venturi action. The check valve (24) is pressed in place andheld therein by the end of the ozone gas transfer tube (28). The ozonegas transfer tube (28) is in turn held frictionally in place by thecollet locking system comprised of lock ring (26), collet (27), ando-ring (25).

In an alternative embodiment of the present invention the check valve(24) of the venturi injector (19) is augmented by means of anelectrically actuated valve (not shown) which is normally closed, butwhich opens when power is supplied to the ozone generator. Theelectrically actuated valve exit port is in communication with the ozoneintake throat of the venturi injector and the electrically actuatedvalve in-flow port is in communication with the ozone gas transfer tube(28). Electrically actuated valves are common to the art and will not befurther described.

The water passes through the length of the venturi injector (19),thereby providing a motive force creating suction at the gas intake port(90) of the venturi injector. The venturi draws in ozone gas mixture anddissolves it in the water stream. The venturi injector (19) of thepresent invention may be composed of 304 or 316 stainless steel or of achlorinated polyvinyl chloride thermoplastic such as CPVC® or of any ofa variety of ozone resistant materials. The venturi injector (19) may bemachined or molded.

The three orifices of the venturi injector (19) are each constructedwith female connecting orifice collet locking devices common to thewater treatment industry, which are known as “John Guest” fittings.These fittings permit the insertion of tubing on the entrance (91) andexit (92) water flow ports, and the connection of the body of the gasintake port (93) to the ozone generation chamber gas distributionmanifold (33). The water thus becomes the vehicle for transporting thesanitizing ozone gas to the surface of foods, surfaces and articles byvirtue of its retained ozone residual, to rinse surfaces, articles andfoods to reduce microbiological contamination thereof. The ozonizedwater passes to a dispensing point (not shown) by means of watertransport tube (94) which may be a valve or water faucet fixtureexhibiting the quality of low resistance, optimally, equal to less thanten percent of the water pressure entering the present invention. Bysuch means and condition, pressure differential across the venturiinjector (19) will be approximate ninety percent according to oneembodiment of the present invention.

The ozone generation device means according to one embodiment of thepresent invention comprises a dielectric assembly, which consists of ahollow rod or tube (54), which is the positive electrode, a rod or tube(53), which is the negative electrode, a heat resistant dielectric (51)composed of high temperature resistant material, such as borosilicateglass and a knob (49) by which the dielectric (51) can be removed.According to one embodiment, the positive and negative electrodes (54)and (53) are formed of 316 L stainless steel tubes. According to oneembodiment, the dielectric (51) is formed of a tube of such materialthat is sized to fit and be inserted into the negative electrode (53).The positive electrode (54) is in turn sized to fit and be inserted intothe dielectric (51).

The positive electrode (54) of the present invention is attached to apower supply (76) by means of an electrical connector (55). One end ofthe connector (55) is connected to the power supply (76) and the otherend has an outside diameter closely approximating the inside diameter ofthe dielectric (51), allowing a relatively tight frictionalcommunication between the connector (55) and the positive electrode(54), which therefore negates the necessity of attachment by solder, orother welded means. The electrical connector (55) is frictionallyattached to the positive electrode (54) and inserted through the firstend (135) of the air intake manifold (40) and extends towards the secondend (136).

In a first aspect, the connector (55) serves the function of providingelectrical communication of power to the positive electrode (54). Asecond aspect of the connector (55) is to align the dielectric (51)substantially in the center of the axial void, or hollow, of thenegative electrode (53). At its distal end, the connector (55) isthreaded to provide means for attaching, in order, a washer (56), ahexagonal nut (57), an electrical wire end ring connector (131) and ahexagonal locking nut (58). The electrical wire end ring connector (131)is in communication with the positive power lead (130) of the powersupply (76) output. The threaded end of the connector (131) is insertedthrough a step down axial opening (96) in the air intake manifold (40).

The air intake manifold (40), in a first aspect, serves to accommodatethe electrical connection and axial centering of the positive electrode(54) within the device dielectric assembly.

In a second aspect, the air intake manifold (40) accommodates the distalend of the dielectric assembly, isolating the positive (54) and negative(53) electrodes from one another, thereby preserving the integrity ofthe corona discharge.

In a third aspect, the air intake manifold (40) provides a means ofholding in place one end of the negative electrode (53), which isinserted frictionally to the point of a chamber stop (98).

In a fourth aspect, the air intake manifold (40) exhibits an airreceiving chamber (99) which houses the portion of the one end of thenegative electrode (53), which, in one embodiment, is perforated at fourquadrant points (perforations (53 a)) to permit the flow of air throughthe corona space extant between the longitudinal annular externalsurface of the dielectric (51) and the inside longitudinal annular spaceof the negative electrode (53). The inside diameter of the air receivingchamber (99) according to one embodiment of the present invention, is atleast about 15% greater than the outside diameter of the negativeelectrode (53) to facilitate the free flow of air around and through theperforations (53 a).

In a fifth aspect of the air intake manifold (40), two pressurized airintake ports (100) and (104) are located opposing one another in directcommunication with the receiving chamber (99). A tubular cartridge checkvalve (102) is frictionally press fit into vacuum air intake port (100).The check valve (102) opens when venturi suction draws air through thecorona discharge space of the electrode set when the present inventionoperates in an aqueous phase. Alternatively, check valve (102) sealsunder pressurization from the diaphragm air pump (45) throughpressurized intake port (104), thereby allowing forced airflow throughthe corona space. The air pump (45) is in communication with thepressurized air intake port (104) by way of air flow tube (44)frictionally attached to the port (104) by means of the collet lockingsystem composed of the collet (43), lock ring (42) and o-ring (41).

The opposing end of the negative electrode (53) is frictionallyencapsulated within the ozone intake port (105) of the ozonedistribution manifold (33). A perforated aluminum cooling fin (52),having two opposing halves, is mounted longitudinally. The central lineof each half is shaped to accept the outside diameter of the negativeelectrode (53). The two halves of the cooling fin (52) are fastenedtogether by four screw, washer and nut arrangements (78), (80), one (78)of which cooling fin fastener arrangements serves as the mount point forthe negative or ground lead (129) in communication with the power supply(76). The ozone intake throat (106) of the ozone distribution manifold(33) is tapered with the lesser diameter of the taper in communicationwith the negative electrode end seat (107). The tapered ozone intakethroat (106) facilitates the act of insertion of the dielectric (51) andmore precisely centers the dielectric within the dielectric assembly.The distal end of the dielectric assembly is inserted within the annularorifice (108) of the ozone distribution manifold (33). The knob shank(110) of the knob (49) includes pegs (109) on its two opposing sideswhich communicate with the locking channel aspect (111) of the insidediameter of the annular orifice (108) of the ozone distribution manifold(33). Upon insertion of the dielectric assembly into the orifice (108),the elastomer o-ring (50) of the dielectric assembly exerts resistanceagainst the o-ring seat (112) thereby effecting a seal against leakageof ozone gas, in a first aspect, and, in a second aspect, effecting afirm lock to hold the dielectric assembly in operational position. In athird aspect, the fully inserted knob shank (110) is in communicationwith the activation lever of safety switch (46), which serves to protectthe dielectric assembly of the ozone generator against operation withoutthe dielectric in place. Switch (46) communicates with the sidewall oflower housing (67) by means to two mount screws (47).

In another embodiment of the present invention (FIGS. 6, 8 and 9), theozone generation dielectric assembly is a single unitary structurecomprised of positive electrode or anode (141) and a negative electrodeor cathode (142) each affixed to the alternate sides of a flatdielectric glass plate (143). The anode (141) and cathode (142) consistof a stainless steel mesh permanently affixed to the dielectric glassplate (143) by means of epoxy glue bead (158), which provides the securecommunication between dielectric and the two electrodes. The electrodes(141), (142) can have varying dimensions, depending on the desiredamount of the ozone to be generated. However, according to oneembodiment of the present invention, the electrodes are each about 6″long, ½″ wide and about 1/20″ thick. The glass plate of the dielectric(143) is slightly larger that the dimensions of the electrodes. Theepoxy bead (158) runs along the entire periphery, that is, along thefour sides, of the anode (141) and cathode (142). The epoxy bead (157)thus further serves as a means to raise the two opposing electrodes offof the dielectric, thereby providing a dielectric gap (144) within thespace created by the bead, between the electrodes and the dielectric,which permits the flow of air or oxygen to pass between electrodes andthe dielectric. Other methods of attaching the electrodes to thedielectric while providing the dielectric gap to permit air or oxygen topass between the electrodes and the dielectric, are considered withinthe skill of the ordinary artisan.

The anode (141) and the cathode (142) are in communication with thepower supply (76), and in particular, the positive power lead (130) onthe one side and the negative power lead (129) on the other side, bymeans of threaded pins (145) which are screwed into orifices (149) inthe electrode housing (148). The connection to the power supply (76) isnot shown in FIG. 8, but is considered within the skill of the ordinaryartisan. The distal end of the pins (145) may be adjusted downward tocompress a spring (146), which provides tension on the power ball (147),thereby maintaining sufficient pressure to communicate electrical energyto the two different electrodes.

The dielectric assembly (140), comprised of anode, cathode anddielectric is encapsulated on its distal end by a knob (150), whichprovides means for grasping and removing the entire dielectric assemblyfrom the electrode housing (148). The cap (150) may be made of athermoplastic material. The entire dielectric assembly (140), thereby,is able to be removed, disposed of and replaced without exposing aperson to harm or staining by nitric acid built up on the electrodes.The assembly (140) is held in communication with the aperture of theelectrode housing (148) by means of indentations (151) on the cap andcorresponding protrusions (152) which communicate in a male/femalemanner and which hold the electrode assembly (140) in place by frictionfit. The aperture (153) is sealed by a flexible gasket (154) composed ofa synthetic rubber, such as EPDM, or other ozone resistant material.

In this alternative electrode form, the air intake manifold and theozone distribution manifold are constructed as a single plastic moldedrectangular device comprising the dielectric set housing (148). Thematerial of the housing may be a fluorine-containing synthetic resin,such as KYNAR®, a chlorinated polyvinyl chloride thermoplastic such asCPVC®, or other ozone resistant plastic. The two pressurized air intakeports (155), the gaseous phase ozone distribution port (156), and theaqueous phase ozone distribution port (157) are constructed using thecollet locking system as previously described.

According to one embodiment of the present invention, two differentozone gas exit ports accommodate the alternative operating modes foraqueous phase and for gaseous phase ozone application (see e.g., FIG.2). This is accomplished, according to one embodiment of the presentinvention, by providing an ozone distribution manifold (33) that isformed of a double T-shaped pipe. The pipe has an ozone distribution armportion 33(a) extending along a first axis through which the dielectricassembly is inserted, and two leg portions (33 b) and (33 c) extendingin the same direction as one another, perpendicular to the arm portion(33 a). The ozone intake port (105) is at one end of the arm portion (33a) and annular orifice (108) is at the other end.

The aqueous phase ozone exit port (113), in the leg portion (33 b) ofthe ozone distribution manifold (33), includes, according to oneembodiment of the present invention, a tubular cartridge check valve(32) as means of preventing entry of water into the dielectric assemblyof the present invention. The tubular cartridge check valve (32) isfrictionally pressed into the lower stepped orifice arrangement (115) ofthe aqueous phase ozone gas exit port (113). Additional stability forthe position of the tubular cartridge check valve (32) is achieved bymeans of the end of ozone transfer tube (28) being locked incommunication with the check valve (32) by means of a collet lockingsystem, including collet (29), lock ring (30), and o-ring (31).

A gas phase ozone exit port (114) is provided in the leg portion (33 b)of the ozone distribution manifold (33) that includes a collet lockingsystem, including collet (34), lock ring (35), and o-ring (36). O-ring(36) is in communication with the gas phase ozone channel tube (38). Ameans of preventing ambient air from being drawn into the ozonedistribution manifold (33) during aqueous phase operation is provided bya tubular cartridge check valve (37). The tubular cartridge check valve(37) is frictionally pressed into the lower stepped orifice arrangement(116) of the gas phase ozone gas exit port (114). Additional stabilityfor the position of the tubular cartridge check valve (37) is achievedby means of the end of the gas phase ozone transfer tube (38) beinglocked in communication with the check valve (37) by means of a colletlocking system, including collet (34), lock ring (35), and o-ring (36).The distal end of the gas phase ozone transfer tube (38) is attached bymeans of a collet locking system (not shown) to a bulkhead fitting (39).The bulkhead fitting 39 is inserted through the wall of the systemhousing (67). The exterior aperture of the bulk head fitting (39)exhibits a second collet locking system which may be utilized to graspan exterior ozone gas distribution tube (not shown) which may be of anyconvenient length for gas phase application of ozone to remote articlesor surfaces. It is understood that the present invention also includesan embodiment (not shown) in which the ozone distribution manifold isformed of a single T-shaped pipe, and that this alternativeconfiguration would eliminate the ozone gaseous phase output option.

According to one embodiment of the present invention, a baseplate (61)is provided which may be molded of thermoplastic or other resilientmaterial. The baseplate (61) includes attachment points exhibitingnesting cavities (64), (63), and (62) into which the venturi injector(19), ozone gas distribution manifold (33) and the air intake manifold(40), respectively, are snapped into firm communication. Each nestedcomponent (64), (63), and (62) is held in place by a snap lock (117) andnotch (118) exhibiting a male/female interface. The base (120) ofinternal power supply (76) is held in communication with the plane ofthe baseplate (61) by a quartet of molded snap locks (65), each having aflexible resilient lip (65 a) which faces inward to the power supply(76). Similarly, the air pump (45) is held firmly in communication withthe plane of the baseplate (61) by a quartet of molded snap locks (66)in configuration to match the perimeter of the lower air pump housing(119).

According to one embodiment of the present invention, the baseplate (61)is mounted within a housing (67) by means of a number of riser pins (82b) that space and support the baseplate (61) off the floor of thehousing to permit air circulation throughout the housing (67) by meansof slotted openings (121). The baseplate (61) is affixed onto the riserpins (82 b) by means of screws (82 a) through holes (82 c) in thebaseplate (61) and into the hollow threaded throats of the riser pins(82 b).

According to one embodiment of the present invention, a flat paneltouchpad (122), including switches (70), (71), and (72), provides meansof switching the mode of operation from aqueous ozonation phase mode toaqueous non-ozonation mode to gaseous phase mode. Touchpad (122) residesat the front panel of housing lid (68), which, according to oneembodiment, is locked to the lower panel of the housing (67) by means ofa lockscrew (69). Power to the present invention is communicated througha power jack (60), which is affixed to the wall of the inventionenclosure and secured by locknut (59). One lead wire (123) communicatesfrom the power jack (60) to the power input connector of the touchpad(122). A second lead wire (124) communicates from the power jack (60) toone side of the safety switch (46). According to one embodiment of thepresent invention, connected to the distal side of the safety switch(46), a first lead wire (125) communicates to flow switch (12) andcontinues to touchpad (122) via circuit wire (132) and a second leadwire (126) communicates to a second power input connector of thetouchpad (122). An operational status indicator light includes a bulb(74), a bulb cowl (75) and an attachment nut (73) and communicates tothe touchpad panel with a lead wire (127). According to one embodiment,a lead wire (128) communicates power from touchpad (122) to air pump(45). Three separate switch functions (70), (71), and (72) communicatewith wire leads (127), (132), and (128) respectively. In particular,lead wire (127) connects the bulb (74) to a switch (70), lead wire (132)connects a twist-on wire connector (133) for the power supply (76) tothe switch (71), and lead wire (128) connects the air pump (45) to theswitch (72).

The device according to the present invention, provides means foroperating the system in an aqueous ozonation phase mode in which waterpassed the system through delivers ozone gas to purify objects on whichis put; means for operating the system in a gaseous phase mode in whichozone gas is pumped outside the system to oxidize odor molecules in thearea in which it is pumped; and means for operating the system in anaqueous non-ozonation phase mode in which water passed through thesystem is filtered to remove impurities without being mixed with ozonegas. The device according to the present invention, is switched betweenits three modes of operation, aqueous ozonation phase mode, aqueousnon-ozonation mode, and gaseous phase mode, by activation of switches(70), (71), or (72) respectively.

The means for operating the system in an aqueous non-ozonation phasemode includes the filtering device described above with reference toparts 1-6, the venturi injector (19), the water transport tube 94, andrelated parts described above. The means for operating the system in agaseous phase mode includes the dielectric assembly, the air intakemanifold (40), the ozone distribution manifold (33), the gas phase ozonetransfer tube (38) and the bulkhead fitting (39) and related partsdescribed above. The means for operating the system in a aqueous phasemode includes the filtering device described above with reference toparts 1-6, the venturi injector (19), the dielectric assembly, andrelated parts described above.

The following is a parts list showing the reference numerals for eachpart described above.

 1 Slip lock tube fitting  2a First filter sump  2b Second sump  3Internal pre-filtration cartridge  4 Thread coupler  5 Filter cartridge 6 Swiveling elbow slip lock fitting  7 Flexible tube  8 Slip lockbulkhead fitting  9 Male elbow lock tube fitting  10 Food grade plastictube  11 Slip lock fitting  12 Flow switch  13 Second slip lock fitting 14 Food grade plastic water input tube  15 Collet  16 Lock ring  17O-ring  18 Venturi motive throat insert  18a Top ring end  18b Bottomend  19 Venturi injector  20 o-ring  21 Lock ring  22 collet  23Threaded nut  24 Tubular cartridge check valve  25 O-ring  26 Lock ring 27 Collet  28 Ozone gas transport tube  29 Collet  30 Lock ring  31o-ring  32 Tubular cartridge check valve  33 Ozone generation chambergas distribution manifold  33a Ozone distribution arm portion  34 Collet 35 Lock ring  36 o-ring  37 Tubular cartridge check valve  38 Gas phaseozone channel tube  39 Bulk head fitting  40 Air intake manifold  41o-ring  42 Lock ring  43 Collet  44 Air flow tube  45 Diaphragm air pump 46 Safety switch  47 Two mount screws  49 Knob  50 Elastomer o-ring ofknob/dielectric assembly  51 Heat resistant dielectric  52 Perforatedaluminum cooling fin  53 Stainless steel tube (negative electrode)  53aPerforations  54 Stainless steel rod or tube (ozone generation devicemeans)   (positive electrode)  55 Electrical connector  56 Washer  57Hexagonal nut  58 Hexagonal nut  59 Locknut  60 Power jack  61 Baseplate 62 Nesting cavity  63 Nesting cavity  64 Nesting cavity  65 Quartet ofmolded snap locks  65a Resilient lip  66 Quartet of molded snap locks 67 Lower housing  67 Housing  68 Housing lid  69 Lockscrew  70 Switchfunctions  71 Switch functions  72 Switch functions  73 Attachment ring 74 Bulb  75 Bulb cowl  76 Power supply  78 Screw, washer, nutarrangement  80 Cooling fin fastener arrangement  82b Riser pins  82aScrews  82c holes  83 2^(nd) step  84 1^(st) step  85 Third stepaperture  86 Third step  87 Fourth of five stepped spaces in gas intakethroat  89 Open space  90 Central tube  91 water entry port  92a Outsidediameter portion of water exit port  92 Water exit port  93 Gas intakeport  94 Water transport tube  96 Step down axial opening  98 Chamberstop  99 Air receiving chamber 100 Vacuum air intake port 102 Tubularcartridge check valve 103 Pressurized air intake port 104 Pressurizedair intake port 105 Ozone intake port 106 Ozone intake throat 107Negative electrode end seat 108 Annular orifice of distribution manifold33 109 Pegs 110 Knob shank 111 Locking channel aspect 112 O ring seat113 Aqueous phase ozone gas exit port of distribution manifold 33 114Gas phase ozone exit port 115 Orifice arrangement of gas exit port 113116 Lower stepped orifice arrangement of gas exit port 117 Snap lock 118Notch 119 Lower air pump housing 120 Base 121 Slotted openings 122 Flatpanel touchpad 123 Lead wire from 60 to power input connector of 122 124Lead wire from 60 to safety switch 46 125 Lead wire from distal side ofsafety switch 46 to flow switch 12 126 Lead wire from distal side ofsafety switch 46 to 2d power input connector of 122 127 Lead wire frombulb to 122 128 Lead wire from 122 to air pump 45 129 Negative or groundlead 130 Power lead 131 Electrical wire end ring connector 131 Connector132 Lead wire 134 Slots in the housing floor 133 Twist-on wire connector135 First end of 40 136 Second end of 40 140 Entire set 141 Anode 142Cathode 143 Flat dielectric glass plate 144 Dielectric gap 145 Threadedpin 146 Spring 147 Power ball 148 Dielectric assembly housing 149Orifice 150 Thermoplastic knob 151 Indentation 152 Protrusions 153Aperture 154 Flexible gaskets 155 Air intake port 156 Gas phase ozonedistribution port 157 Aqueous phase ozone distribution port 158 Epoxyglue bead

The foregoing description of the specific embodiments will so fullyreveal the general nature of the invention that others can, by applyingcurrent knowledge, readily modify and/or adapt for various applicationssuch specific embodiments without undue experimentation and withoutdeparting from the generic concept, and, therefore, such adaptations andmodifications should and are intended to be comprehended within themeaning and range of equivalents of the disclosed embodiments. It is tobe understood that the phraseology or terminology employed herein is forthe purpose of description and not of limitation. The means, materials,and steps for carrying out various disclosed functions may take avariety of alternative forms without departing from the invention.

Thus the expressions “means to . . . ” and “means for . . . ”, or anymethod step language, as may be found in the specification above and/orin the claims below, followed by a functional statement, are intended todefine and cover whatever structural, physical, chemical or electricalelement or structure, or whatever method step, which may now or in thefuture exist which carries out the recited function, whether or notprecisely equivalent to the embodiment or embodiments disclosed in thespecification above, i.e., other means or steps for carrying out thesame functions can be used; and it is intended that such expressions begiven their broadest interpretation.

What is claimed is:
 1. A system for at least one of sanitizing anddeodorizing, comprising: an input configured to receive liquid from aliquid supply; a dielectric assembly for generating ozone, thedielectric assembly comprising: a positive electrode, a negativeelectrode in operation proximity to the positive electrode, and adielectric in operational proximity to the positive and negativeelectrodes; a venturi injector in fluid communication with the input andbeing configured to mix the generated ozone with liquid as it flowsthrough the venturi injector and to output ozonated liquid, wherein boththe dielectric assembly and the venturi injector are at least partiallydisposed in a common system housing and wherein at least one of (i) thedielectric, and (ii) the dielectric assembly, is slidably removable fromthe common system housing from a location outside the common systemhousing via an opening in the common system housing.
 2. The systemaccording to claim 1, wherein the venturi injector comprises: a liquidentry port at a first distal end of the venturi injector into which anend of a liquid input tube is inserted; a liquid exit port at a seconddistal end of the venturi injector opposed to said liquid entry port, acentral tube through which liquid flows between the liquid entry portand the liquid exit port; and a gas entry port in fluid communicationwith the liquid flow, wherein the liquid flows through the central tubebetween the liquid intake port and the liquid exit port therebyproviding a motive force creating suction at the gas intake port, whichdraws in ozone gas through the gas entry port and dissolves it in theliquid flow.
 3. The system according to claim 2, wherein the liquidentry port comprises a stepped aperture having at least three steps,each having successively narrower diameters moving downstream along theliquid flow through the central tube.
 4. The system according to claim3, further comprising a removable venturi motive throat insert having atop ring end having an outside diameter substantially identical to adiameter of a liquid input tube and a bottom end having an outsidediameter sized to fit into the central tube, the venturi motive throatinsert being seated on a base of a third one of the steps where it ispressed in place functionally by the liquid input tube.
 5. The systemaccording to claim 4, wherein the venturi motive throat insert can havedifferent diameters, and flow strength and internal pressure of theliquid flowing through the venturi injector can be varied by using aventuri motive throat insert having a desired internal diameter.
 6. Thesystem according to claim 2, further comprising a check valve connectedto the gas entry port to prevent liquid from entering a gas transporttube.
 7. The system according to claim 1, further comprising a filterdevice in fluid communication with the input for filtering liquidprovided through the input.
 8. The system according to claim 7, whereinthe filter device comprises; a first filter sump having an input influid communication with the liquid supply and an output; apre-filtration cartridge disposed within the first filter sump throughwhich the liquid from the liquid supply passes for removing from theliquid particulate material larger than a predetermined size; a secondfilter sump having an input in fluid communication with the output ofthe first filter sump and an output; a filter cartridge disposed withinthe second filter sump through which the liquid passes for removingimpurities from the liquid.
 9. The system according to claim 1, furthercomprising: a dielectric assembly housing disposed in the common systemhousing: wherein the dielectric assembly includes an aperture in whichthe dielectric assembly is removably engaged via a friction fit betweenthe aperture and a cap connected to the dielectric assembly.
 10. Thesystem according to claim 9, wherein the dielectric assembly furthercomprises a negative electrode and a positive electrode.
 11. The systemaccording to claim 10, wherein the negative electrode comprises a hollowtube, the dielectric comprises a hollow tube formed of a hightemperature resistant material sized to fit inside the negativeelectrode, wherein the positive electrode comprises a hollow tube sizedto fit inside the dielectric, and the dielectric assembly furthercomprises an electrical connector having one end connected to a powersupply and a second end which has an outside diameter closelyapproximating an inside diameter of the dielectric allowing a tightfrictional communication between the connector and the positiveelectrode and to align the dielectric substantially in a center of thenegative electrode.
 12. The system according to claim 1, furthercomprising: a direct current power system for providing power to thedielectric assembly.
 13. A system least one of sanitizing anddeodorizing, comprising: an input configured to receive liquid from aliquid supply; a dielectric assembly comprising a dielectric forgenerating ozone; a venturi injector in fluid communication with theinput and being configured to mix the generated ozone with liquid as itflows through the venturi injector and to output ozonated liquid; and afilter device connected to the liquid supply, wherein the venturiinjector is configured to receive liquid from the liquid supply and theozone from the dielectric assembly, wherein the system is configured tooperate in an aqueous ozonation phase mode in which the filter devicesupplies the liquid to the injector, the dielectric assembly suppliesthe ozone to the injector, and the injector mixes the generated ozonewith the liquid to output the ozonated liquid; wherein the system isconfigured to operate in a gaseous phase mode in which the dielectricassembly supplies the ozone to the injector to output the ozone; whereinthe system is configured to operate in an aqueous non-ozonation phasemode in which the filter device supplies the liquid to the injector tooutput filtered liquid; and a control configured to permit selectiveoperation of the system in one of the three modes.